首页
登录
职称英语
Pollution control is management of waste materials in order to minimize the
Pollution control is management of waste materials in order to minimize the
游客
2025-01-16
14
管理
问题
Pollution control is management of waste materials in order to minimize the effects of pollutants on people and the environment. The quality of human health and of the natural environment depends on adequate pollution control. In the United States much has been done to control the more noticeable pollutants since 1965: more subtle yet still hazardous pollutants, however, remain to be adequately controlled.
Four general approaches to pollution control are: the intermittent reduction of industrial activities during periods of high air-pollution conditions; wider dispersion of pollutants using such devices as taller smokestacks; reduction of pollutants in industrial emission; and change of an industrial process or activity in order to produce less pollution. Taller smokestacks may reduce the concentrations to which local people are exposed, but they are ineffective in reducing overall pollution.
Pollutants removed from waste flows to reduce emissions to air and water may be disposed of by burial or storage on land, practices that pose potential hazards. Recent legislation requiring extensive emissions reductions has resulted in large investments in pollution-treatment technologies.
The fourth approach — changing a manufacturing process or activity in order to produce less pollution — may involve either the production of fewer residuals, by means of an improved process, or the separation and reuse of materials from the waste stream. This method of pollution control is the most effective and, as the costs of pollution control and waste disposal increase, is considered one of the most efficient.
Pollution-treatment systems have been effective in reducing the massive quantities of water and air pollutants that have clogged and choked urban areas. Although the improvements have been significant, recent pollution-control legislation aims to go further in order to control the less visible but often hazardous chemical and gaseous pollutants that still contaminate many waterways and urban atmospheres.
The costs of pollution control — resulting from capital, maintenance, and labor costs, as well as from the cost of additional residuals disposal — generally go up rapidly as a greater percentage of residuals is removed from the waste stream. Damage from pollution, on the other hand, goes down as a greater amount of contaminant is removed. Theoretically, the level of treatment should correspond to a point at which total costs of treatment and of damage to the environment are minimized or the benefits of further treatment are proportionally much smaller than the increased cost. In reality, costs or damages resulting from pollution can rarely be assessed in terms of dollars. [br] The overall purpose of the passage is______.
选项
A、to discuss the ways of and problems in pollution control
B、to give suggestions about pollution control legislation
C、to compare and contrast the four approaches to pollution control
D、to describe what has been achieved in pollution control
答案
A
解析
这是道主旨题。主旨题一般需要反映整篇文章的中心意思,有时是对整篇文章的概括。这篇文章主要讲的是控制环境污染的四种方式以及出现的一些问题。容易混淆的是第三个答案:比较控制环境污染的四种方式。许多考生会选择这个选项,因为文中前半部分就是分析的四种方式,但是整篇文章不仅仅讲的是这四种方式,还有控制环境污染所碰到的一些问题,故不能选C,要选A。
转载请注明原文地址:https://tihaiku.com/zcyy/3914646.html
相关试题推荐
Elaineisawomanwhollyincontrolofherbodyandheractions,andherhilario
AccordingtotheWHO,environmentalpollutionisaffectingmostchildrenthrough
Pollutioncontrolismanagementofwastematerialsinordertominimizethe
Pollutioncontrolismanagementofwastematerialsinordertominimizethe
Pollutioncontrolismanagementofwastematerialsinordertominimizethe
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined
[originaltext]Thebottled-waterpriceshaveskyrocketedduetothepollutionof
[originaltext]Thebottled-waterpriceshaveskyrocketedduetothepollutionof
随机试题
Forsomepeople,thelightofhumanattentionhasanunbearablebrilliance.
MississippiisatypicalAmericansouthernstate.[originaltext]Nostateepitomi
PassageOne(1)WhenCarolineMeeberboardedtheafternoontrainforC
A
为提高旋转阳极X线管的短时负荷所采取的措施中,错误的是A.提高阳极旋转速度 B
患者,女,32岁,已婚。因:“停经30周,右下腹疼痛伴发热、恶心、呕吐1天”就诊
痞满肝胃不和证的代表方是A.枳实消痞丸加减 B.木香顺气丸加减 C.连
面试热点:行之力则知愈进,知之深则行愈达 热点背景: 在改革开放40
一般认为,“职业”是人们用以谋生的手段,而专业是对公众所期待的责任有承诺的职业团
根据《化学品安全标签编写规定》,化学品安全标签主要包括名称、危险性级别等项内容,
最新回复
(
0
)